Toner set
US9958798B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Mar 26, 2015 |
| Grant date | May 1, 2018 |
| Priority date | — |
| Expiry date | Mar 26, 2035 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03G9/1085
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
There is provided a toner set including a yellow toner, a cyan toner and a magenta toner, the toners each comprising an external additive and colored resin particles comprising a binder resin, a colorant and a charge control agent. An absolute value of an average of q/d for any of the yellow, cyan and magenta toners is expressed by charge amount q (fC) and particle diameter d (μm). It is obtained by measurement using an electric field detachment-type charge amount distribution measurement device. It is in a range of 2.0 to 6.5 fC/10 μm, and a standard deviation (SD) of q/d is 13 fC/10 μm or less. A difference between average values of q/d for any two of the yellow, cyan and magenta toners is 2.0 fC/10 μm or less. A difference (ΔSD) between standard deviations of q/d for the two toners is 5.0 fC/10 μm or less.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.